1. I = V/R
2. V = IR
3. R = V/I
4. P = VI
5. P = I²R
6. P = V²/R
7. V = √(PR)
8. I = √(P/R)
9. R = P/I²
10. R = V²/P
11. V = P/I
12. I = P/V
13. I = ∆V/∆R
14. R = ∆V/∆I